A researcher is interested in whether people with tattoos are evaluated more negatively than people without tattoos. She first obtains overall ratings of attractiveness for a woman with no tattoos shown in a color photograph. On a 7-point scale, the woman received an average rating of = 4.9, and the distribution of ratings was normal with a standard deviation of = 0.75. The researcher then modified the photo by adding a tattoo of a butterfly on the woman's left arm. The modified photo was then shown to a sample of n = 16 participants. The mean score for the photo with the tattoo was M = 4.6. Compute Cohen's d to measure the effect size